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[79.139.233.37]) by smtp.gmail.com with ESMTPSA id j23sm9166942lji.41.2019.11.18.12.05.49 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 18 Nov 2019 12:05:50 -0800 (PST) From: Dmitry Osipenko To: Thierry Reding , Jonathan Hunter , Peter De Schrijver , Mikko Perttunen , Georgi Djakov , Rob Herring Cc: linux-tegra@vger.kernel.org, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org Subject: [PATCH v1 20/29] memory: tegra30-emc: Continue probing if timings are missing in device-tree Date: Mon, 18 Nov 2019 23:02:38 +0300 Message-Id: <20191118200247.3567-21-digetx@gmail.com> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20191118200247.3567-1-digetx@gmail.com> References: <20191118200247.3567-1-digetx@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org EMC driver will become mandatory after making it interconnect provider because interconnect users like display controller driver will fail to probe using newer device-trees that have interconnect properties. Thus make driver to probe even if timings are missing in device-tree, the frequency scaling won't be available in this case because there will be only one frequency available, the frequency that is left from bootloader. Signed-off-by: Dmitry Osipenko --- drivers/memory/tegra/tegra30-emc.c | 29 +++++++++++++++-------------- 1 file changed, 15 insertions(+), 14 deletions(-) diff --git a/drivers/memory/tegra/tegra30-emc.c b/drivers/memory/tegra/tegra30-emc.c index 0b6a5e451ea3..ee194e8ed521 100644 --- a/drivers/memory/tegra/tegra30-emc.c +++ b/drivers/memory/tegra/tegra30-emc.c @@ -985,6 +985,11 @@ static struct device_node *emc_find_node_by_ram_code(struct device *dev) u32 value, ram_code; int err; + if (of_get_child_count(dev->of_node) == 0) { + dev_info(dev, "device-tree doesn't have memory timings\n"); + return NULL; + } + ram_code = tegra_read_ram_code(); for_each_child_of_node(dev->of_node, np) { @@ -1054,6 +1059,9 @@ static long emc_round_rate(unsigned long rate, struct tegra_emc *emc = arg; unsigned int i; + if (!emc->num_timings) + return clk_get_rate(emc->clk); + min_rate = min(min_rate, emc->timings[emc->num_timings - 1].rate); for (i = 0; i < emc->num_timings; i++) { @@ -1090,12 +1098,6 @@ static int tegra_emc_probe(struct platform_device *pdev) struct tegra_emc *emc; int err; - if (of_get_child_count(pdev->dev.of_node) == 0) { - dev_info(&pdev->dev, - "device-tree node doesn't have memory timings\n"); - return -ENODEV; - } - np = of_parse_phandle(pdev->dev.of_node, "nvidia,memory-controller", 0); if (!np) { dev_err(&pdev->dev, "could not get memory controller node\n"); @@ -1107,10 +1109,6 @@ static int tegra_emc_probe(struct platform_device *pdev) if (!mc) return -ENOENT; - np = emc_find_node_by_ram_code(&pdev->dev); - if (!np) - return -EINVAL; - emc = devm_kzalloc(&pdev->dev, sizeof(*emc), GFP_KERNEL); if (!emc) { of_node_put(np); @@ -1125,10 +1123,13 @@ static int tegra_emc_probe(struct platform_device *pdev) emc->clk_nb.notifier_call = emc_clk_change_notify; emc->dev = &pdev->dev; - err = emc_load_timings_from_dt(emc, np); - of_node_put(np); - if (err) - return err; + np = emc_find_node_by_ram_code(&pdev->dev); + if (np) { + err = emc_load_timings_from_dt(emc, np); + of_node_put(np); + if (err) + return err; + } emc->regs = devm_platform_ioremap_resource(pdev, 0); if (IS_ERR(emc->regs)) -- 2.23.0 From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.5 required=3.0 tests=DKIM_ADSP_CUSTOM_MED, FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5FA5FC432C0 for ; Tue, 19 Nov 2019 08:04:27 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 3DE20222EF for ; Tue, 19 Nov 2019 08:04:27 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3DE20222EF Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 9EBA26EBB6; Tue, 19 Nov 2019 08:04:08 +0000 (UTC) Received: from mail-lf1-x143.google.com (mail-lf1-x143.google.com [IPv6:2a00:1450:4864:20::143]) by gabe.freedesktop.org (Postfix) with ESMTPS id 376FC6E81F for ; Mon, 18 Nov 2019 20:05:52 +0000 (UTC) Received: by mail-lf1-x143.google.com with SMTP id q28so14895217lfa.5 for ; Mon, 18 Nov 2019 12:05:52 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=pVZm4+AsGt54/AHvdx3eAP7bC+QNmdTq1ECOejtB9ug=; b=bMaVsIydwO7Zjt/LQT5TVNHaLOy3nACLMxBQ37CcOAENYJyKAPEeK1oRp1GbiZcEfb qqs5lLzBCo44Ebglfg0nLIy9tlVZDqBu9yreoun+ZvGLoZnMPn5DjUdzntw5BBhUYYgV L9gF21Z6//kfGIxzjqPfQgY90ujWmy/ea689cAzBn4e7KxEGOHGwRNir4+visc2+bj0H SvwcH/NLR232NK6gw8w12YkzkexP+saFUAl+q0erjssYZqw/KJGErj+0+0XhHrehWtDJ q9Oe/in08tBBekSoLndtPKWQW6w7uijb7vS5dAJCaig5sKUj4cmdln9Cn2XgvesX0dg/ 5GgQ== X-Gm-Message-State: APjAAAVwexguCny+VMbny8UgbcXJLstIovIUYZwqA9LgN1QaN+Cisu3t yDmotbejC/1CyOdvvgwx9ec= X-Google-Smtp-Source: APXvYqzk8qaHiHHwXkRhrrIE1sEeZDnQkjSy/cXco/zY2jqK1B4NhcEaAJRIhsbVtVbWItOdvoICRw== X-Received: by 2002:ac2:5685:: with SMTP id 5mr938614lfr.32.1574107550658; Mon, 18 Nov 2019 12:05:50 -0800 (PST) Received: from localhost.localdomain (79-139-233-37.dynamic.spd-mgts.ru. 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